Ethyl mercaptan

Minimal fetoxicity (skeletal variations) was observed in the offspring of rats treated at 100 and 3 54ppm for 6 hours/day on gestation days 6-15 maternal toxicity was also evident at these doses.  

Applied to the skin of animals a 4-hour occluded dose produced mild to moderate erythema and edema. Similar contact for 24 hours resulted in marked erythema, necrosis, and ulceration. Instilled in rabbit eyes, tbe liquid bas caused mild conjunctival hyperemia. 

Ethylidene norbornene was not mutagenic or clastogenic in a variety of in vitro assays. The 2003 ACGIH ceiling-threshold limit value (C-TLV) for ethylidene norbornene is 5 ppm (25 mg/m ). 

Kinkead ER, Pozzani UC, Geary DL, Carpenter CP The mammalian toxicity of ethylidene norbornene. Toxicol Appl Pharmacol 20 250-259, 1971 

Ballantyne B, Myers RC, Klonne DR Comparative acute toxicity and primary irritancy of the ethylidene and vinyl isomers of norbornene.y Appl Toxicol 17(4) 211-221, 1997 

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The mixture should be colourless, otherwise difficulty will be experienced in the subsequent purification of the product. If the reaction mixture is coloured by iodine (due to volatilisation of some of the mercaptan), add just sufficient ethyl mercaptan to decolourise it. 

At one time thiols were named mercaptans Thus CH3CH2SH was called ethyl mercaptan according to this system This nomenclature was abandoned beginning with the 1965 revision of the lUPAC rules but is still sometimes encountered When one encounters a thiol for the first time especially a low molecular weight thiol its most obvious property is its foul odor Ethanethiol is added to natural gas so that leaks can be detected without special equipment—your nose is so sensitive that it can detect less than one part of ethanethiol m 10 000 000 000 parts of arr The odor of thiols weakens... 

The lead acetate removes any unreacted m ethyl mercaptan by precipitating it as the lead salt. 

Ethyl malonate, see Diethyl malonate Ethyl mercaptan, see Ethanethiol ... 

Ethyl chloride Ethyl ether Ethyl formate 2-Ethyl hexanol Ethyl mercaptan Ethyl silicate Ethylene... 

Epoxy-l-Propanol, see Glycidol Ethanethiol, see Ethyl mercaptan Ethanolamine 2-Ethoxyethanol... 

Further evidence for a pseudooxazolone intermediate is the fragmentation of 72 by ethyl mercaptan in hydrobromic acid-acetic acid [Eq. (33)]. The mercaptal 74 hydrolyzes readily in acetic acid to give the 2-0X0 acid. 

Evaporate the sample to dryness with clean, dry nitrogen. Add 0.5 ml of 2N HC1 in isopropyl alcohol. Heat at 100° for 1 hour. If tryptophan and/or cystine are suspected of being present, add 1 ml of ethyl mercaptan to prevent oxidation. Evaporate the reaction... 

Ethanethiol, see Ethyl mercaptan Ethanol, see Ethyl alcohol ... 

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